Pixel Defect Policy - Philips 221TE4LB/57 Service Manual

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4.2 Factory Preset Modes
Computer Formats
Resolution
640x 480
640 x 480
640 x 480
720 x 400
800 x 600
800 x 600
800 x 600
800 x 600
1024 x 768
1024 x 768
1024 x 768
1280 x 1024
1440 x 900
1680 x 1050
1920 x 1080
Video Formats:
Resolution
480i
480p
576p
720p
1080i
1080p

4.3 Pixel Defect Policy

Philips strives to deliver the highest quality products.
We use some of the industry's most advanced
manufacturing processes and practice stringent quality
control. However, pixel or sub pixel defects on a flat
monitor panel are sometimes unavoidable. No
manufacturer can guarantee that all panels will be free
from pixel defects, but Philips guarantees that any
monitor with an unacceptable number of defects will be
repaired or replaced under warranty. This notice
explains the different types of pixel defects and defines
Refresh Rate
60Hz
72Hz
75Hz
70Hz
56Hz
60Hz
72Hz
75Hz
60Hz
70Hz
75Hz
60Hz
60Hz
60Hz
60Hz
Refresh Rate
60Hz
60Hz
50Hz
50Hz, 60Hz
50Hz, 60Hz
24Hz, 50Hz, 60Hz
acceptable defect levels for each type. In order to
qualify for repair or replacement under warranty, the
number of pixel defects on a monitor panel must
exceed these acceptable levels. For example, no more
than 0.0004% of the sub pixels on a monitor may be
defective. Furthermore, Philips sets even higher quality
standards for certain types or combinations of pixel
defects that are more noticeable than others. This
policy is valid worldwide.
Pixels and Sub pixels
A pixel, or picture element, is composed of three sub
pixels in the primary colors of red, green and blue.
Many pixels together form an image. When all sub
pixels of a pixel are lit, the three colored sub pixels
together appear as a single white pixel. When all are
dark, the three colored sub pixels together appear as a
single black pixel. Other combinations of lit and dark
sub pixels appear as single pixels of other colors.
Types of Pixel Defects
Pixel and sub pixel defects appear on the screen in
different ways. There are two categories of pixel
defects and several types of sub pixel defects within
each category.
Bright Dot Defects: Bright dot defects appear as
pixels or sub pixels that are always lit or 'on'. That is, a
bright dot is a sub-pixel that stands out on the screen
when the monitor displays a dark pattern.
These are some types of bright dot defects: